---
phase: 12
slug: comparison-view
status: draft
nyquist_compliant: false
wave_0_complete: false
created: 2026-03-17
---

# Phase 12 — Validation Strategy

> Per-phase validation contract for feedback sampling during execution.

---

## Test Infrastructure

| Property | Value |
|----------|-------|
| **Framework** | Bun test (built-in) |
| **Config file** | None — uses `bun test` directly |
| **Quick run command** | `bun test` |
| **Full suite command** | `bun test` |
| **Estimated runtime** | ~5 seconds |

---

## Sampling Rate

- **After every task commit:** Run `bun test`
- **After every plan wave:** Run `bun test`
- **Before `/gsd:verify-work`:** Full suite must be green
- **Max feedback latency:** 5 seconds

---

## Per-Task Verification Map

| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
|---------|------|------|-------------|-----------|-------------------|-------------|--------|
| 12-01-01 | 01 | 1 | COMP-01 | manual-only (UI/browser) | — | N/A | ⬜ pending |
| 12-01-02 | 01 | 1 | COMP-02 | unit (if delta util extracted) | `bun test tests/lib/comparison-deltas.test.ts` | ❌ W0 | ⬜ pending |
| 12-01-03 | 01 | 1 | COMP-03 | manual-only (CSS/browser) | — | N/A | ⬜ pending |
| 12-01-04 | 01 | 1 | COMP-04 | manual-only (UI state) | — | N/A | ⬜ pending |

*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*

---

## Wave 0 Requirements

- [ ] `tests/lib/comparison-deltas.test.ts` — stubs for COMP-02 delta computation (optional; skip if deltas stay inlined in React component via useMemo)

*Existing `bun test` infrastructure covers all backend services. This phase is pure frontend — no backend tests are broken.*

---

## Manual-Only Verifications

| Behavior | Requirement | Why Manual | Test Instructions |
|----------|-------------|------------|-------------------|
| Candidates display all fields in tabular columns | COMP-01 | UI rendering — no backend logic | Open thread with 2+ candidates, toggle compare view, verify all fields visible |
| Table scrolls horizontally with sticky label column | COMP-03 | CSS behavior — requires browser | Narrow viewport to <768px, verify horizontal scroll, verify label column stays fixed |
| Resolved thread shows read-only view with winner marked | COMP-04 | UI state — requires resolved thread | Open resolved thread, toggle compare view, verify winner column highlighted, no interactive elements |
| Missing weight/price shows dash, not zero | COMP-04 | UI rendering for null data | Add candidate with no weight, toggle compare, verify "—" not "0g" |

---

## Validation Sign-Off

- [ ] All tasks have `<automated>` verify or Wave 0 dependencies
- [ ] Sampling continuity: no 3 consecutive tasks without automated verify
- [ ] Wave 0 covers all MISSING references
- [ ] No watch-mode flags
- [ ] Feedback latency < 5s
- [ ] `nyquist_compliant: true` set in frontmatter

**Approval:** pending